What is the molecular formula for propanol?

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Study for the IGCSE Organic Chemistry Test. Engage with flashcards and multiple-choice questions, complete with hints and detailed explanations. Prepare effectively to excel in your exam!

Multiple Choice

What is the molecular formula for propanol?

Explanation:
Propanol is an alcohol with three carbon atoms and a hydroxyl group (-OH). Counting all atoms gives three carbons, eight hydrogens, and one oxygen, so the molecular formula is C3H8O. Writing it as C3H7OH shows the same composition but spells out the -OH group explicitly; it’s just another valid way to represent the same molecule. So this option is effectively the same formula written to highlight the functional group. The other options would change the number of carbons or hydrogens, so they don’t describe propanol.

Propanol is an alcohol with three carbon atoms and a hydroxyl group (-OH). Counting all atoms gives three carbons, eight hydrogens, and one oxygen, so the molecular formula is C3H8O. Writing it as C3H7OH shows the same composition but spells out the -OH group explicitly; it’s just another valid way to represent the same molecule. So this option is effectively the same formula written to highlight the functional group. The other options would change the number of carbons or hydrogens, so they don’t describe propanol.

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